16
AARNRNG!:
Do not mount more than two (2) KLA12 loudspeakers on a pole over the KLA181 subwoofer, KW181 subwoofer
or on a loudspeaker tripod. Do not use a pole longer than 36 inches (914 mm) when supporting one or two KLA12s over a
KLA181 or KW181 subwoofer.
1. Adjust the QSC Tilt-Direct™ dual angle pole socket to the zero (default) position or the 9° position.
2. Carefully place one KLA12 on the loudspeaker pole by inserting the pole completely into the QSC Tilt-Direct™ pole socket. Use proper
lifting techniques.
3. If you want to mount two KLA12 loudspeakers on the pole, after you place the first loudspeaker on the pole, attach the top one using the
procedure
"Attaching a KLA12 to a KLA12 or KLA AF12 Array Frame" on page 10
.
Cooling in Installed Applications
The KLA Series is an internally-powered loudspeaker containing a power amplifier that produces heat. Allow a minimum of 6" (152 mm) clearance at
the rear of the enclosure for cooling. Do not restrict airflow to the rear of the speaker enclosure.
AATNORG!:
Do not install enclosures with their rear panels exposed to direct sunlight. Direct sunlight will heat the amplifier
module and reduce its ability to produce full output. Install sunshades if the application merits. Maximum ambient temperature for full
performance to specification is 50° C (122° F). Do not install enclosures where exposed to rain or other water sources. The enclosure is
not weatherproof. Outdoor installations must provide protection from the elements.
Audio Connections
Refer to
Figure 26.
There are two XLR connectors on the amplifier: one LINE IN (female), and one LINE OUT (male). These connectors provide for the input, and audio
loop-thru capability.
Input
Use the ATTEN knob
(2)
to control the attenuation of the input signal on the LINE IN connector
(1)
This control sets the sensitivity, and thereby the
amount of signal sent to the power amplifier and, in turn, to the loudspeaker components.
The green SIGNAL LED
(3)
illuminates when signal is present, regardless of the amount of attenuation as set by the ATTEN knob. If the LED does
not illuminate, the input is not receiving any signal or the level of the signal is significantly low. Check all connections and the status of the device
delivering the signal.
— Figure 29 —
3
2
1
3
2
1
KLA12
KLA181
4
4
